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(No Model.) 4 Sheets-Sheet l.

R. BARRETT LIFT FOR PLATE ROLLING MILLS.

No.271,766. V Feb.6,1883,.

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Patented Peb.6,18 83.

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(No Model.) -4 Sheets-Sheet 3.

R. BARRETT.

LIFT FOR PLATE ROLLING MILLS;

PatentedPeb'. 6; 1883-.

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(No Model.)

R. BAR RETT. LIFT FOB. PLATE ROLLING MILLS.

Patented Feb. 6, 1883.}-

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ai dq UNITED STATES PATENT OFFICE.

ROBERT BARRETT, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO PAUL A. FUSZ, OF SAME PLACE.

ROLLING MILLS.

SPECIFICATION forming part of Letters Patent No. 271,766, dated February 6, 1883.

Application f led June 21, 1882. (No model.)

larger scale, showing the foundation; Fig. 3,

a front elevation or view from the rollers side; Fig. 4, a plan of the table on the rollers side; Fig. 5, a plan of the table on the catchers side; Fig. 6, a vertical longitudinal section of the rolls-and lift, Figs. 7 and 8,a' front and a side view, respectively, of one of the guides used in directing the movement of the table on the rollers side; Figs. 9 and 10, respect ively, a front elevation and a plan of the butfer beneath the table on the rollers side, and

"Fig. 11a detail.

The same letters denote the same parts.v

The present invention is an improvement in lifts for rolls for rolling iron plates.

The improvement relates to the means for controlling the descent of the lift.

it also has reference to the buffer and'cushion on the rollers side of therolls, to the means for guiding and inclining the rollers table, in

its ascent and descent, to the shelfbetween the lower rolland the catchers table, and to other details hereinatter specified.

A represents a train of rolls having the improvement in question, and. saving the improvement, the rolls are of the usual description.

B B represent the rolls, and B the housing.

O represents the table on the rollers side of the train, being the table from which the plate is delivered into the rolls.

D represents the oatchers table, upon which the plate is received from the rolls. In practies the plate is delivered upon the table 0 from a truck, the truck being rolled against the bufferE with sufficient momentum tocause on a larger scale in Figs. 9, 10. It consists mainly of the bar e, the rods 6', the springs 0 and the rollers e As the truck strikes the bar 0, the springs 0 yield, and the rods 6 slip backward through a fixed bar, 6. The table 0, in receivingthe plate from the truck, is atthe level and in the position shown inthe full lines in Figs. 1, 2, 3, 6, being inclined somewhat toward, and nearly or quite, atits forward edge,

touching the lower roll, B, and near the top thereof. The plateis passed through the rolls, as indicated by the arrow 00, Fig. 6, and is received upon the table D. The tables 0 D are then lifted into the position indicated by the broken lines in Fig. 6, the lifting being efi'ected as follows: The table D islifte d by the rods D and the table 0 by means of the rods 0. The rods D O at their upper ends connect with the lever F. The lever F, by means of the link f, is jointed to the support f, and by means of the linkf is. connected with the piston-rod G of the cylinder 9. The

steam being admitted into the cylinder, the

lever F and tables O Darelit'ted, as described. The table D, being at the end of the lever F, is lifted higher than the table O. Its move-- ment is directly upward, and it is guided by the bars (1. The table O is lifted, and also tilted slightly outward from the upper roll, B, and in passing the bulge of the upper roll the tablelnust be withdrawn from that .roll suffi ciently to clear it. These last two named movements are effected as follows: The arms 0 (3 which are rigidly connected with the table, are-at their upper-ends jointed to liriks G which in turn are jointed to arms 0 The last-named parts are fixtures upon the hous ing B As the table 0 rises, the links 0 and arms 0 operate to tilt the table into the position indicated by the broken lines in Fig. 6, and the guides G (thetable O has projections c engaging in the guides 0 operate, by reason of this peculiar shape,-as shown, to direct the table backward from the roll B sufficiently to enable the table to pass the roll. a The table 0, when lifted, is preferably just above the center of the upper roll. The guides G are attached to the housing B The plate, being elevated upon the table D to the level of the top of the roll B, is passed backward over the roll B onto the table again, and thelift lings jj to admit the bars 61 d of the table.

is ready to be lowered. Thisis effected by exhausting the steam from the cylinder g. The movement of the lift, both in its upward and in its downward movement, I have ascertained, should not in practice be wholly within the control'of the person tending the rolls. When such is the case the lift is apt to be lifted and lowered too suddenly. Accordingly, in the present construction, means have been devised for checking the movement of the lift,

sothat it shall not take place above a certain rate, which means are independent of the mechanism employed by the tender in operating the lift, as follows: 9* is a throttle-valve in the pipe, through which the steam is supplied to the cylinder 9. By suitably setting this valve the amountofsteam supplied to the cylinder is limited. The steam-supply pipe does not pass directly to the cylinder g, but enters a valve-cham her, 9, and thence, through the pipe 9 Figs. 2, 11, passes to the cylinder g. The steam is exhausted from the cylinder gthrough the pipe 9 the chamber g, and the pipe g.

A valve, 9 in the chamber 9 is used to determine the movement of the steam to'and from the cylinder 9. When the valve is in the position shown in the full lines in Fig. 11

the steam exhausts from the cylinder g, and

tothe lever 9 which is within reach of the .rolls tender, and by suitably moving the le- -ver 9 the steam is admitted to and discharged from the cylinder and the lift raised and lowered. The throttle g, however, as stated, prevents the steam from beingadmitted too freely to the cylinder, and by means of a valve, 9 in theexhaust-pipe g, which in practice is adjusted similarly to the valve 9 the exhaust is cramped and the steam prevented from exhausting too freely from the cylinder.

The fall of the lift is cushioned by means of the rods H and the springs I, the table 0 encountering the rods H and the table D the springs I. The rods H work upward and downward through the bar 0. Underneath this bar the rods bear upon springs h h, and are thus elastically upheld. A guide, J, preferably made in sectionsjj, is interposed between the roll B and the table D. 'The guide serves to direct the plate properly onto the table D. The guide has open- The table, when lowered to receive the plate,

must not be above the level of the guide. The

guide is supported by the rest K.

The present improvement, while well adapted to trains for rolling'plate-iron, can be used in connection with many other formsof iron, aswell as for trains for other metals.

I claimv 1. The combination of a train-lift, a steam or other cylinder for operating the lift, and means for controlling the admission of the steam into the cylinder, consisting of a supply-pipe provided with a valve, 9 chamber 9 pipe 9 and cylinder 9, substantially as described.

2. The combination of a train -lift, a steam or other cylinder for operating the lift, and means for con trollingthe escape of the exhaust from the cylinder, consisting of the cylinder 9, pipe 9 chamber g pipe g, and valve 9 for the purpose described.

3. The combination of the lift herein described, the cylinder g, the exhaust-pipe g, the

valves g 9 supply-pipe and valve 9 the connection g and the lever 9 substantially as described.

4. The buffer E, as and for the purpose described.

5. The combination of the buffer E and the table 0, substantially as described.

6. The combination of the table Oand the elastically-supported rods H, substantially as.

the arms 0 and the guides 0 substantially as described.

10. The combination of the rolls B B, the tables (J D, the rods 0 D, the arms 0 the links 0 the arms 0 the guides 0 the lever F, and the piston-rod G, substantially as de scribed.

11. The combination of the rollB, the shelf J, having the openings j, and the table D, substantially as described.

- ROBERT BARRETT. Witnesses:

U. D. MOODY, PAUL A. -FUsz. 

